I forget the year MGLN is set in so I will have nanoha,fate,hayate and the others their age born in the year 1990 and Artemis{Fem Harry} born in 1994 making her 4 years younger then them and 6 during the jewel seed Incident.

During the Belka/Mid-Childa war to help aid the tome of the Night Sky a new tome built on the same design but without the spell library reset when activated but sadly just as the tome was finished and named Tome der Dämmerung Himmel or the Tome of the Twillight Heaven the Tome des Nachthimmels or Tome of the Night sky's defence program was corrupted making it go berserk and fearing that it would happen to the new Tome of the Twilight Heaven due to it's programing being almost the same as the Night Sky's it was ordered to be sealed, How ever some of the scientests dueing the sealing attempted to send it away via Diminonal Transport causing a error in the sealing as the tome was sent away many thought it destoryed as it was never found.

It was on July 30th 1895 that the Tome of the Twilight Heaven's seal broken and it appeared on earth where it would be prassed from owner to owner until 1999 where it would finally awaken and get it's 1st master.

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Artemis Lily Potter was not a happy child her parents was mudered when she was 15 months old tho she was happy she was able to remember all the way back to her 1st birthday due to having a photographic memory and then some old guy her parents knew left on her aunts doorstep in the middle of the night, She really hated the Dursley's as they treated her like a slave, She was given the bare minimum of food to keep her healthy so that no one would question why a girl was sickly thin or short seeing as they couldn't just force her to wear dudley's old cloths as it would be unsightly for a young girl to wear oversized male clothes.

Now most are wondering who Artemis Potter is to the Wizarding World she is the Girl-Who-Lived to the Dursley's she's the Freak or Girl but what no one but Artemis knew is that Artemis Lily Potter in a full fledged Metamorphamagus meaning her skills are on par with a shapeshifter and Artemis used this to her advantage some times using her metamorph skills to mimic what the books say that the greek goddess artemis looks like, most of time tho she has Platinum Silver hair and sapphire blue eyes that she keeps as her base look instead of her old dark brown almost black hair and emerald{Avada kadavra} green eyes she had when her parents was alive.

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6 year old Artemis was running as fast she she could now normally this wouldn't be seen as something wrong but behind her was her cousin Dudley and his gang who was chasing her to try and hurt her like every other time they played 'Artemis hunting' now every other time Artmis would've done her best to run towards the Library to hide but today they had managed to keep themselves between her and the possible streets that would lead her there so she ended up running down a small side alley and through a small hole in the chain-link fence before running down another alley losing not only dudley and his gang but also her own way without backtracking and into dudley's gang.

It had been almost 10 minutes of wondering when Artemis came across the backdoor of a shop she knocked on the door afew times before trying the door knob and oddly enough finding it unlocked it wouldn't be untill she walked into the backroom of the shop she found out why it was unlocked the shop was empty execpt afew old books including one hat was chained up, Blinking Artemis picked the chained book up wondering why a book would be chained up and tried to open it with no luck and sighed before holding it to her chest and walking out towards teh front of the store and looked out the winder to find it was a street over from where she had ran from dudley and his gang to and waited untill it was safe to exit the shop without anything looking wrongand headed towards the library to spend her free time that she had between school and having to return to the durley's house to cook them their dinner.

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Artemis sighed it was late at night and she was unable to fall asleep so she took out the weird chained up book again and tried to open it again only to get frustrated unkowningly she had started to send her magic into the book and it's chain causing the book to start pulsing like a heartbeat while glowing a redish purple color untill the chains broke.
[Wecken Glanz, das Licht der Hoffnung, Hüterin der Tome der Dämmerung Himmel] a voice says after a Redish Purpler triangle with 3 spell circles 1 at each point of the triangle and a 4 pointed cross in the center formed,

The book opens and runs through Hundreds of pages [Erste Aktivierung gestartet, keine Fehler gefunden, Rune Skript aktiv] before snaping shut [Zauber der Bibliothek aktiv, Speicher Programm Klare, Simulation Programm eingestellt],

And a small flash of light blinded Artemis for a moment causing her to close her eyes [Lanzekreuz Stukturiertes in Ordnung, Dämmerung Ritter Programm Stadby, Sicherheit Programm aktiv] she had to wait untill the pain in her eyes [Level Resrtion aktiv, Administrative Programm, Avatar Unison Form einstellen],

Only to open them and find herself face to face with a 10" tall Fairy that had Silver hair like she tended to have most the time with Golden Red eyes wearing a form fitting Red and Purple Dress before the book floated down between her and the fairy as it opens it's mouth,

[Administrativen Befugnisse gewährt, administrativen Assimilation starten] A beam of pink light hit her in the chest Causing Artemis to not be able to move not that she had much space as it was before she started to feel numb before a tugging from her chest let her know something was going on,

[Mindspace Programm starten, Linker core Projektion Verarbeitung] before ribbions of light appeared from the book and wraped around something she couldn't see causing her to feel drained before the ribbons wraped around her also with the last thing she herd before everything went dark being [Willkommen im Licht, meine Herrin der Dämmerung Himmel].

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Please Note I had to rely on a translation program to get the german words so sorry if there's any issues in the translations.
Wecken Glanz, das Licht der Hoffnung, Hüterin der Tome der Dämmerung Himmel = Awaken shine, the light of the hope, guardian of the Tome of the twilight Heaven
Erste Aktivierung gestartet, keine Fehler gefunden, Rune Skript aktiv = initial Activation Started, No Erros Found, Rune Script Active
Zauber der Bibliothek aktiv, Speicher Programm Klare, Simulation Programm eingestellt = Spell library active, memory Program Clear, Set simulation program
Lanzekreuz Stukturiertes in Ordnung, Dämmerung Ritter Programm Stadby, Sicherheit Programm aktiv = Lanzekreuz Stucture In Order, Dämmerung knight Program Stadby, Security Program active
Level Resrtion aktiv, Administrative Programm, Avatar Unison Form einstellen = Level Resrtion Active, Administrative Program Set, Avatar Unison Form Set
Administrativen Befugnisse gewährt, administrativen Assimilation starten = Administrative Powers Granted, Administrative Assimilation Start
Mindspace Programm starten, Linker core Projektion Verarbeitung = Mindspace Programm Starting, Linker core Projection Processing
Willkommen im Licht, meine Herrin der Dämmerung Himmel = Welcome to the Light, My Mistress of the Twilight Heaven

Please note credit to Red Skies and Destinies By: Addie Card as i based the start up on the device she had in her fic called the tome of the crimson sky.

Edit 4/23/15: I've tryied to clear up everything with the tome's activation to make it not so clustered up.